Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Volvo XC90 R-Design, AWDFACTORY OEM SERVICE PROCEDURE
Audio Control Module (To Aerial)
Before taking any readings, see CHECKING VOLTAGE / GROUND CONNECTION, MEDIA/INFOTAINMENT .
| Control module terminal | Breakout box terminal | Signal type | Ignition on | Miscellaneous |
|---|---|---|---|---|
| C1 | #45 | Aerial signal, head aerial | Analogue signal | - |
| C2 | #46 | Power supply and aerial signal, sub aerial | Analogue signal | The aerial signal is retained over DC |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.